### Eclipse Workspace Patch 1.0
#P org.eclipse.pde.ui
Index: src/org/eclipse/pde/internal/ui/pderesources.properties
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/pderesources.properties,v
retrieving revision 1.894
diff -u -r1.894 pderesources.properties
--- src/org/eclipse/pde/internal/ui/pderesources.properties	22 Jul 2007 22:31:28 -0000	1.894
+++ src/org/eclipse/pde/internal/ui/pderesources.properties	24 Jul 2007 16:27:42 -0000
@@ -1334,6 +1334,7 @@
 PluginWorkingSet_deselectAll_label=Dese&lect All
 PluginDevelopmentPage_presentation=Plug-in Manifest Editor Presentation
 PluginGeneralInfoSection_lazyStart=Activate this plug-in when one of its classes is loaded
+PluginGeneralInfoSection_singleton=Make this plug-in a singleton
 PluginWorkingSet_deselectAll_toolTip=Unselect all of these plug-ins for this working set.
 PluginListPage_initializeFromPlugins=&Initialize from the plug-ins list:
 PluginWorkingSet_noPluginsChecked=At least one plug-in must be checked
Index: src/org/eclipse/pde/internal/ui/PDEUIMessages.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/PDEUIMessages.java,v
retrieving revision 1.301
diff -u -r1.301 PDEUIMessages.java
--- src/org/eclipse/pde/internal/ui/PDEUIMessages.java	22 Jul 2007 05:30:17 -0000	1.301
+++ src/org/eclipse/pde/internal/ui/PDEUIMessages.java	24 Jul 2007 16:27:22 -0000
@@ -2290,6 +2290,8 @@
 
 	public static String PluginGeneralInfoSection_lazyStart;
 
+	public static String PluginGeneralInfoSection_singleton;
+
 	public static String ClassSearchParticipant_taskMessage;
 
 	public static String CreateJREBundleHeaderResolution_desc;
Index: src/org/eclipse/pde/internal/ui/editor/plugin/PluginGeneralInfoSection.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/plugin/PluginGeneralInfoSection.java,v
retrieving revision 1.29
diff -u -r1.29 PluginGeneralInfoSection.java
--- src/org/eclipse/pde/internal/ui/editor/plugin/PluginGeneralInfoSection.java	8 Jun 2007 16:47:58 -0000	1.29
+++ src/org/eclipse/pde/internal/ui/editor/plugin/PluginGeneralInfoSection.java	24 Jul 2007 16:27:43 -0000
@@ -24,6 +24,7 @@
 import org.eclipse.pde.internal.core.ibundle.IBundleModel;
 import org.eclipse.pde.internal.core.ibundle.IManifestHeader;
 import org.eclipse.pde.internal.core.text.bundle.Bundle;
+import org.eclipse.pde.internal.core.text.bundle.BundleSymbolicNameHeader;
 import org.eclipse.pde.internal.core.text.bundle.LazyStartHeader;
 import org.eclipse.pde.internal.ui.PDEPlugin;
 import org.eclipse.pde.internal.ui.PDEUIMessages;
@@ -47,6 +48,7 @@
 
 	private FormEntry fClassEntry;
 	private Button fLazyStart;
+	private Button fSingleton;
 	private TypeFieldAssistDisposer fTypeFieldAssistDisposer;
 
 	public PluginGeneralInfoSection(PDEFormPage page, Composite parent) {
@@ -63,6 +65,7 @@
 		if (isBundle() && (formEditor instanceof ManifestEditor)
 				&& ((ManifestEditor) formEditor).isEquinox()) {
 			createLazyStart(parent, toolkit, actionBars);
+			createSingleton(parent, toolkit, actionBars);
 		}
 	}
 
@@ -102,6 +105,21 @@
 		});
 	}
 	
+	private void createSingleton(Composite parent, FormToolkit toolkit, IActionBars actionBars) {
+		fSingleton = toolkit.createButton(parent, PDEUIMessages.PluginGeneralInfoSection_singleton, SWT.CHECK);
+		TableWrapData td = new TableWrapData();
+		td.colspan = 3;
+		fSingleton.setLayoutData(td);
+		fSingleton.setEnabled(isEditable());
+		fSingleton.addSelectionListener(new SelectionAdapter() {
+			public void widgetSelected(SelectionEvent e) {
+				IManifestHeader header = getSingletonHeader();
+				if (header instanceof BundleSymbolicNameHeader)
+					((BundleSymbolicNameHeader)header).setSingleton(fSingleton.getSelection());
+			}
+		});
+	}
+	
 	private void createClassEntry(Composite client, FormToolkit toolkit, IActionBars actionBars) {
 		boolean isEditable = isEditable();
 		fClassEntry = new FormEntry(
@@ -180,6 +198,11 @@
 			fLazyStart.setSelection(header instanceof LazyStartHeader 
 					&& ((LazyStartHeader)header).isLazyStart());
 		}
+		if (fSingleton != null) {
+			IManifestHeader header = getSingletonHeader();
+			fSingleton.setSelection(header instanceof BundleSymbolicNameHeader 
+					&& ((BundleSymbolicNameHeader)header).isSingleton());
+		}
 		super.refresh();
 	}
 	
@@ -201,6 +224,16 @@
 		return ICoreConstants.ECLIPSE_AUTOSTART;
 	}
 
+	private IManifestHeader getSingletonHeader() {
+		IBundle bundle = getBundle();
+		if (bundle instanceof Bundle) {
+			IManifestHeader header = bundle.getManifestHeader(org.osgi.framework.Constants.BUNDLE_SYMBOLICNAME);
+			return header;
+		}
+		return null;
+	}
+
+	
 	/* (non-Javadoc)
 	 * @see org.eclipse.pde.internal.ui.editor.plugin.GeneralInfoSection#dispose()
 	 */